Hook fixture



FIG. 1 is a perspective view of a hook fixture showing my new design;

FIG. 2 is a top plan view thereof, the bottom being unornamented;

FIG. 3 is a front elevational view thereof, the rear being unornamented;

FIG. 4 is a right side elevational view thereof. 

The ornamental design for a hook fixture, substantially as shown and described. 